Local-circuit-controlling apparatus for printing-telegraph systems.



G. S. HILTZ. LOCAL CIRCUIT CONTROLLING APPARATUQ FOR PRINTING TELEGRAPHSYSTEMS.

APPLICATION FILED B 1914 1,142,037 I I I PatentedJune 8,1915.

cEOaeE s. HILTZ, or NEW YORK, u. YL, s'ssieivonro sTocK' euore'rroivrnnuennrn COMPANY, or NEW YORK, n. it, A eoerosn'riou or new roux,

- LOCAL-CIRCUIT-CONTBOLLING APPARATUS FOR PRINTING-TELEGRAPH SYSTEMS.

incense,

Specification of Letters Patent.

Patented Eunice, Ilfiifi.

Application filed September 8, 1914. Serial 1Y0. 8%,593.

To aZZ whom it may concern Y Be it known'that I, Gnoncn S. Hn'rrz, a

citizen of the United States, residingin the borough of Brooklyn andcounty of Kings,

in the city and State of New York, have invented certain new and usefulImprove ments in LocalCircuit-Controlling Apparanumber of receivinginstruments are c0n-- trolled by the same transmitter, as in the case ofstock-tickers, news-tickers, and the like, it is customary to putthereceivers in one or more local circuits and to control the latterthrough one or more relays.- In

modern systems, particularly those operating on a single 1nain-linecircuit, the current is essentially alternating, that is, it consists ofa series 'of impulses alternating in polarity. For this reasontherelayis in effect a pole-changing switch, actuatedelectromagnetically by the main line current. Hence breaking of themain-line circuit does .not open the local curcuit but leaves cur-rent Iflowing in the latter in the same direction as the last impulse in themain line; so that when the main line current is cut off at\the close ofbusiness a further operation of some sort, as for eXample the opening ofa manually actuated switch, is necessary if the current of the localcircuit is also to be .cut off. This duty is often overlooked'orforgotten by the operator or attendant with the result that the localcircuit or circuits remain closed, with consequentwaste of current andother disadvantages. I have'accordinglybeen ledto devise my I presentinvention, which has for its chief object to provide an improved systemof control for the local circuit or circuits, by

which the opening ofthe main circuit for more than a momentary period oftime will cause the former to be opened also.

A further'object is to provide a system in which the closing of the maincircuit for sending will simultaneously close the local circuit orcircuits controlled thereby. Inasmuch as in most cases the main :circuitis j open when not in us e,.being closed by the mere act of depressing atransmitter key and opened by release of the key, it will be i seen thatwhen the invention is employed Withsuch a system the local circuit willbe closed only so long as the operator is actuallyxusing the line.

To these and other ends 2 the invention consists in the novel featuresof construction and combinations of elements hereinafter described.

Of the various embodiments of w'hich the invention is capable I haveselected for illuswhich at the present time is believed to exhibit theinvention in its most convenient 7 I s I and eiiective form Thisembodiment is illustrated diagrammatically inthe accom-" panyin gdrawing, to which reference is now made. Two local clrcults are shown,each w th controlling devices, but it is to be unplerstood thatthe-precise number, whether one or two, or more, is 1mn1ater1al.' Thetwo illustrated are equipped exactly alike, go that a description of onewill suflice for ot H v v Inthe embodiment illustrated-the specificconstruction of the transmitter is, immaterial, so long as it is adaptedto/send impulses of alternating polarity. Usually the transmitter issemi-automatic in character, the depression of'a keyserving to send to,

' the line the number of impulses corresponding to the letter orcharacter which it. isdesired to print.

In the drawing I have shown at A a simtration and specificdescriptionherein the one ple transmitting device, the same consistingof two conducting bars 10, 11, and two keys 12, 13, playing between thebars and normally in'contact with the upper bar only. The direct-currentsource 14 being connected to the bars as shown, it will be seen that if]key'12 is depressed out of contact with the upper bar and into contactwith thelower an impulse will be sent over the line in one direction, asfor example that indicated by the arrow a. Depression of the'other' keywill therefore send an impulse in the opposite direction, indicated bythe arrow a.

'The relay B, which controls the local circuit at the leftof thedrawing, consist's'of 'two magnets, Z2, 6, each having an inner Vwinding 15 .and an outer winding 16, the former belng shown as composedof'coarser' f wire to distinguish it readily from the outer winding. Theinner windings, which are in series with each other and with adirectcurrent source 17 through a pair of separable contacts 18,19, are.so disposed as to" produce poles of the same strength and the psamesign, for example, positive, at the inner ends offthe cores 20, 21 whenthe current isflowingfrom the source 17. Hence so far, as these fieldsarefconcerned there is The result "is {that in the absencefof any.

other magnetization the tongue will cling to whichever of the contacts23, 24 it .was

last brought. g windings 16,which arein series w th each other and withthe transmitter A, are so disposed as to produce poiesptunlike sign atthe inner ends of the cores, forgexample positive in the core 21 andnegative-in the other'when a positive impulse isflowing.

The positive field thus producediwillgthen strengthen the positive fieldat the end of core '21 due to the winding 15 around the core, but thenegative field at the other side will neutralize orgreatly diminish theposi tive field already existing there, and ingcon- ,relayarmature.

sequence the armature will be powerfully-attractedtoward the right.Similarly, the armature is attracted toward the left when the main-linecurrent is reversed; I In this way a comparatively weak line-currentsuf-' fices to produce very rapidmovement of the As shown, the positiveterminal 24 isconnected by wire.25,' to the positive pole and thenegative terminal 23 is connected to the. negative pole of the localbattery 26. The battery is split centrally and grounded'at 27.. Thecontact 18,- in circuit with the source 17 and the windings-15, isstationary, while the contact 19" is carried by one end of a pivotedcontact-lever 29. A light coil spring 30 tends to close the contacts,but the adjacent end of the lever bears on an armature 31 which is urgedclockwise by a stiffer spring 32,

so that when the armature is in the position 3 4 magnets of relay B.Similarly, the positive shown the contacts 18-, 19.are open.

22 through Wire 22 and a pivoted contact lever. 33 carrying a contact34, and a stationary contact 35, which latter is connected to .oneside'oif the receivers by the wire-36L 01'1 the opposite side the localcircuit is groundedat 37. The lower end of the lever 33 bears on theadjacent end of the armature 31, andis urged clockwise, tending to closethe contacts 34, 35, by'a light 'spring38. It

will be understood that the spring 32 is stronger than springs 30 and 38combined,

\ so as to hold contacts 18-49 and 3435.

are in series with each other and with the transmitter through the outerwindings On the other hand, the'outer 251i the system illustrated, thetime con- 16 01 the relay or repeater BL Thesemagnets are so designed asto their" time-con stants that whenan alternating line current of theminimum: or any higher frequency.

'used is flowing through them theywill swing i3 the armature 31 to theleft and hold it there firmly, thereby allowing the springs 30' and\ 38to close /the contacts 18.-- 19,'3435, and

hold them/closed.

larities of the magnets will be quick enough to cause thegnagnets topick up the armature and hdldiit in the closed position before thespring hashad time to act. For this l purpose the residual magnetism ofthe cores should be'rather small, and accordingly I prefer-to make thecores of wires or laminae, as indicated.. It 1s in general deslrable tohave-the magnets as quick-acting asp'ossible, as it permits the use of aspring 32 strong enough to swing the armature clockwise with certaintywhen the main-line circuit is opened at theclose of business and yetnotstrong enough to allow chattering while the alternating current isflowing.

The local circuit of the receivers R, R, at

the righthand side of the drawing, is

equipped like the one already described.

Thus the local circuit of the relay D through the source 41 and theinner windings (not shown) of the relaymagnets is closed, when thesystemis in operation, through the contacts 42, 43, thereby impressing on thecores a magnetization of constant polarity;'while the outer windings ofthese relay magnets, grounded at 55, are in series with the transmitterand with the similar windings of the terminal -44 is connected with thepositive pole of the local battery 45, whose other pole is connected tothe terminal '47; the battery being split and connected to ground at 48.The armature or tongue 49 is connected by wire 50 to one sideofreceivers- B through thetcontact lever .51and the. contacts 52, 53,and on the other side of the rev I ceivers is grounded at 54'. Themagnets of the controlling device E, which is inall respects similar tothe device C, are in thei main line, in series with the magnets of thelatter device, and the main line is grounded at 56. I

, In orderto make the various circuits perfectly clear they may betraced as follows: Whenthe key '12 is de'p ressed, the curreht flowsfrom battery 14 'to bar '11,, key 12, magnets-57 58 and 4039,wire' 59,outer windings of. the relays B and D, and thence through wire 60 toground 55. This current energizes the aforesaid magnets, whereupon! thecontacts ranger-s5, 424s,

i tery. Atthe same time, the armature 22 is swung. to the right, so thatcurrent flows from the battery 26 through Wire to terminal 24., armature22, wire 22 lever 33,

contacts 34+35, wire 36, through the receivers R to ground 37, thence toground 27 and back tethe battery 26. Currents in the same direction alsoflow through. the corre- "spondingcircuits at the right, through the,contacts 42-43, and through the armature 49 and contacts. 52 53 to thereceivers R and ground 54? Upon depression of the key 13 the current inthe main line, through the controllers C, E, and relays B, D, isreversed,but without causing the contacts 18-1'9, 3-t'35, l2-43, and5253 to open.

. The armatures 22 and 49, however, swing to the left, so that in theleft-hand receivercircuit the direction of the current is now frombattery 26 to ground 27, ground '37, receivers R, wire 36, contacts.35,3' l, lever 33, wire 22-, armature22, terminal 23, and Wire (52 tothe battery; While in the righth'and circuit it flows in thecorresponding direc' tion and path, namely, from battery 45 to ground48, ground 54:, receiyers R, conta cts 5352, lever 51, wire 50, armature4L9,-terminal 47, and Wire 63 back to the battery.

It will thus be seen that when impulses of rapidly alte nating polarityare being sent through the controlling magnets 40 39, 57 -58, thereceiving local circuits'and the relay magnetizing circuits (through theinner windings) are kept' closed by the controlling magnets; so, also,if a current of constant polarity, or a prolonged impulse is sent overthe line, as for example to actuate the printing devices of thereceivers after such devices have been set up .by the altherein, one ormore receivers'havmg a local circuit connected w1th the relay to receiveternating-impulses. On the other hand, a break in the main-line circuitof more than momentary duration, as when the line is opened at .theclose of business for the day, deenergizes the controlling magnets andpermits their spring-actuated armature to open the relay and receivercircuits, thereby leaving all parts of the system dead. The firstimpulse thereafter, however; closes the circuits mentioned and restoresthesystem to operative condition.

It is to be understood that the invention is not limited to'the specificarrangement and construction hereinilliistrated and described but can beembodied in other forms Without departure from its proper spirit andscope.

'1. The combination with one or more receivers, of a local circuittherefona relay connected with the local .circuit to control the same, arelay-circuit to magnetize the relay, a main-line circuit through therelay to actuate the same in conjunction with the magnetization producedby the relay-circuit, an electromagnetic controlllng devlce in the main=ine circuit, and means actuated by said do ice to keep the local circuitand the relay circuit closed when the main-line circuit is closedand-operating automatically to open the local circuit and the relaycircuit when the main-line circuit is opened, as set forth. v I

2. The combination of a relay having a local energizing circuit, ama1n-line circuit through the relay to additionally energize therelay,one or more receivers having a local energizing circuit controlled bythe relay, an electromagnet in the main-line circuit and energized bycurrent therein, an armature in the field of the electromagnet, and cansactuated by the armature to keep the receiver and relay circuits closedwhen current is flowing in the main-line circuit and to keep the sameopen when the main-line clrcuit is open.

3. The combination witha main transmit ting-circuit, of a relay thereinhaving a local energizing circuit, one or more receivers having a localcircuit controlled by the re-. lay, and automaticmeans under the controlof the main transmitting circuit to open and close both said localcircuits.

alternating current-impulses in predetermined correspondence with thecurrent impulses in the main transmitting circuit, and automatic meansto open the local circuit when the main transmitting circuit is dead. 9

' 6. The combination with a main-line circuit, and means for sendingcurrent-im pulses of alternating polarity therethrough,

, of a pole-changing relay in said circuit, one

or more receivers having a local circuit connected with the relay toreceive alternating current-impulses in predetermined correspondencewith the impulses in the mainline circuit, and means operating automatically to open the local circuit when the mainline circuit is dead, andadapted to keep the same closed when the main line circuit is alive. Thecombination-With a main-line cir cuit, and means for transmittingtherethrough current impulses of alternating plarity, of a pole changingrelay in said circuit for actuation thereby and having a localdirectrurrent energizing circuit, one

or more receivers having a local circuit connected with the relay toreceive current impulses of alternating polarity inpredeterminedcorrespondence with the impulsesin the main-line circuit;and automatic means controlled by the main-line circuit to open andclose both said local circuits.

-8. The combination with-a main-line cir- I cuit for alternatingcurrent-impulses; of a 1 pole-changing relay comprised of a pair ofoppositely disposed magnets having a local circuit to produce like polesat the inner ends of the magnets, windings in series with the main-linecircuit to produce unlike poles'at -said inner ends, an armature betweenthe magnets, and contacts on opposite sides of the'armature; a source ofdirect current having; itsterminals connected with the.

"relay contacts; one or more receiverscon- 'nected with the armature andwith the said sourcev between the terminals thereof; and

means controlled by current inthe main-line T circuit to keep closed therelay local circuit and the connection between the receivers and therelay armature. v I 9. Thecombination with a main-line circuitfor'current-impulses of alternating polarity; of a relay in saidcircuit; one or more receivers hung *a local circuit controlled by-therelay in predetermined correspondence with the current impulses in themain-- line circuit; and means tokeep the local circuit closed when themain line circuit is alive and to open the local circuit when themain-line circuit is dead, said means iriclud ing an electromagnetconnected in the mainline circuit and adapted to be energizedsubstantially continuously by' the current im-' pulses therein. V

. 1Q. The combination with a main transmitting circuit; of one or morereceivers,

having a local circuit; a relay in the trans- -mitting circuit andcontrolling the local cir- "cuit; separable contacts in thelocalcircuit; a spring-actuated lever to close the local circuitatthecontacts; an electromagnet in the transmitting circuit; andaspring-actuated armaturefor theelectroinagnet, cooperating 1with1the:said'- l'ever to actuate the same and 1 hold the local circuit open whenthe electromagnet is de'energized andto permit the --.'lever toclose-the local/circuit whenthe electromagnet is energized. l.- a .1 11;The combination with a main circuit and means for transmittingcurrent-impulses of alternatingpolaritythereover; of a relay .intheinaincircuit; one. or fmore receivers [having a local circuit-,controlled by the relay-;contacts in. theglocal circuit; a lever toshift oneof the. contacts into and out of engagement with .the other;;aspring 0011-" nectedvwith the lever to swing the same in one directionand thereby close the local circuit at the contacts; an armatureengaging the lever; a spring connected'with the armature to swing thearmature and rock said lever against the tension of its spring toopen-the local circ'uitat the contacts; and

an electromagnetin the main circuit and having'a local energizingcircuit; separable contacts in the said relay-energizing circuit;

,a lever to close the contacts; a spring to actuate the lever; one ormore receivers,

having a local circuit controlled by the polechanging relay whereby thecurrent-impulses in the main circuit are repeated in the localreceiver-circuit; separable contacts in the receiver-circuit; a Ileverto close the last named contacts; a spring to actuate-the lastnamedlever; an armature piv'otedbetween its ends and having its ends inengagement with said levers; a spring connected with the armature toswing the same in'opposition to the lever-springs and thereby open thelocal-circuit of the receivers and the I inthe main circuit and adaptedto be continuously energizedjby thealternating current-impulses therein,,one of said electro-- magnets being arranged ad acent to one arm relayenergizing circuit; and electroinagnets of the armature and on one sidethereof and another adjacent to the other arm of the armature on theother side thereof, whereby both magnets when energized act. to swingthe armature in the same angular. direction against the tension of itsspring to permit he springs of-sa d levers toact and close the localcircuits. i.

In testimony whereof aiiiX' my signature in the presence oftwosubscribing itnesses. j GEORGE-s. HILTZ.

Witnesses: Y

M. LAWSON DYER', S. s lD nvrmM.

